COMMVAULT SYSTEM PARTICIPATES IN MSA 2.0 RELEASE.

CommVault Systems Inc., a provider of unified enterprise data management solutions, has committed to continue participation in the Microsoft System Architecture (MSA). The recently released version 2.0 marks Microsoft's third delivery of its Best Practice Guidance for small and large enterprise users and in all three, CommVault software has been selected to provide backup and recovery capability. This version introduces disk-to-disk and VSS (Volume Shadow Copy Service) based data protection strategies for Microsoft Windows Server 2003, Exchange Server 2003 and SQL 2000.

Microsoft designed the Microsoft Systems Architecture (MSA) program to include stringently tested, recommended solutions in the areas of small and large enterprise data management. Microsoft's step-by-step guidance provides businesses with knowledge from respected Subject Matter Experts in the industry and offers expertise to seamlessly and simply perform data management tasks such as backup, restore, disaster recovery, networking, server hardware integration, storage and services. Microsoft's recommended architectural guidance includes the deployment and operation of a data management solution using CommVault QiNetix software when Windows Server 2003 is utilized.

Microsoft, CommVault and the MSA partners strive to meet the performance requirements necessary to support today's rapidly evolving business needs and environments. Each configuration is subject to a rigorous qualification process in order to ensure that the MSA standards are met and are consistent throughout all current and future MSA infrastructure offerings. CommVault participated with Microsoft and key partners in development of deployment scenarios, capped off with long term, meticulous testing in order to ensure that customers using Microsoft enterprise solutions can receive the technical expertise and guidance required to protect and keep their data highly available.

The guidance, available on Microsoft's TechNet web-site, offers customers and IT architects the ability to save significant time and cost when planning, installing and operating data centers. The robust testing enables the planning, installation and operation of data centers that are resilient and have no single point of failure. The MSA 2.0 guidance, blended into one solution, includes the Microsoft Windows Server 2003 family with Active Directory, SQL Server 2000, Exchange Server 2003 and other Microsoft applications, working with CommVault QiNetix software.

The MSA Documents are available at: http://www.microsoft.com/technet/treeview/default.asp?url=/ technet/itsolutions/msa/default.asp

The MSA specific CommVault information can also be found with Microsoft Solution Accelerator at: http://www.microsoft.com/downloads/details.aspx?FamilyId=44CC 5722-F6FF-4F66-93A2-86659E900303&displaylang=en

"Enterprise customers today are asking for completely tested, proven hardware and software system configurations and best practices that help assure them of the highest level of success in the shortest possible time," said Jim Hebert, general manager, Windows Server Product Management Group. "Microsoft Systems Architecture is one of the ways we provide our enterprise customers with guidance on implementation of complete system solutions. In all three of our MSA releases, CommVault has been an important industry partner, delivering data management expertise that helps protect and enhance our customers' storage environments with granular data protection and full disaster recovery capability."

"At CommVault, we're once again proud to complete this latest delivery of MSA Guidance and partner with Microsoft and the other MSA partners on this solution architecture. The MSA scenarios that Microsoft has created gives their broad range of small and large enterprise users, model environments in which to rapidly deploy and secure their data centers. The MSA effort shows CommVault's products can assist and accelerate upgrades from existing environments and more quickly leverage the new storage capabilities from the Windows Server family. Our customers use the guidance to save time, effort and cost, while relying on the level of detail provided in the MSA literature." said Randy DeMeno, CommVault's director of Advanced Applications and Microsoft Relationship.

The MSA 2.0 release, covering System Design, Architecture, Deployment & Build and Daily Operations also contain important information about security, cost management and return on investment via backup, restore, disaster recovery and lifecycle data management. There are also suggestions about:

-- Leveraging various media types for storage -- Object and Attribute Level restore for Active Directory -- Transparent use of powerful VSS (Virtual Shadow Services) built into Windows Server 2003 -- Simplifying SAN environments while managing them from any Web browser -- Granular application backup and recovery capability -- Data retention and media rotation -- Secured computing with Firewall and VLAN integration -- Disk-to-Disk management of data within a Windows SAN -- Management of SQL Split Mirror Shadow Copies integrated with LAN Free data movement

About CommVault Systems, Inc.

CommVault Systems, Inc. provides unified enterprise data management solutions to ensure high-performance data protection, universal availability and simplified management of complex storage networks. The CommVault QiNetix platform, based on CommVault's Common Technology Engine, provides the ultimate data protection: managing data throughout its lifecycle via integrated backup/recovery, migration, archiving, replication, storage management. CommVault's corporate headquarters is located in Oceanport, New Jersey in the United States.

CommVault Systems can be found on the World Wide Web at http://www.commvault.com.

For more information, call 732/870-4000.